G.f.: A(x) = INV(x - x*INV(x - x^2*INV(x - x^3*INV(x - x^4*INV(x - ...))))), where INV(F(x)) = series reversion of F(x).

A194956

G.f.: A(x) = INV(x - x*INV(x - x^2*INV(x - x^3*INV(x - x^4*INV(x - ...))))), where INV(F(x)) = series reversion of F(x).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =20a(5) =73a(6) =281a(7) =1125a(8) =4636a(9) =19540a(10) =83848a(11) =365107a(12) =1609285a(13) =7166523a(14) =32195965a(15) =145746024a(16) =664165843a(17) =3044370240a(18) =14027289780a(19) =64932957320a(20) =301833739881

External references